How does VLF metal detector work?

How does VLF metal detector work?

Very Low Frequency (VLF) This type of metal detector uses two coils, one sends and the other receives, to pick up on targets in the ground. The sender coil creates a magnetic field that reacts to metal objects.

Which circuit is used in metal detector?

The LC Circuit, which consists of L1 (coil) and C1, is the main metal detector part of the circuit. With the help of this LC Circuit, which is also called as Tank Circuit or Tuned Circuit, the TDA0161 IC acts as an oscillator and oscillates at a particular frequency.

What is detector circuit?

In radio, a detector is a device or circuit that extracts information from a modulated radio frequency current or voltage. The term dates from the first three decades of radio (1888-1918).

What are the components of a metal detector?

An industrial metal detector consists of four main components: the sensor, the control, the signal processor, and the output device. The sensor will react to the proximity of metal. The reaction of the sensor is transmitted to the filter, an electronic device that interprets the sensor signal.

What frequency is gold found at?

Gold can be found at 14 kHz and higher. At frequencies between 3 kHz and 7 kHz, silver, copper, and brass can be found. At frequencies between 4 kHz and 8 kHz, nickel and aluminum are most readily found.

What does kHz mean in metal detecting?

A common definition of frequency is as follows: The number of waves per unit of time measured in Khz or kilohertz. In a metal detector this is the number of electronic waves sent into the ground to detect metal. Example: 10 Khz means your detector will send and receive 10 000 times per second.

What does gold register on a metal detector?

Alloy of Gold and The Reading on a Metal Detector This is due to conductivity of the metal being detected. Which, is one of the main things a metal detector takes into consideration when displaying visual or audio cues to the user.

What is pulse induction metal detector?

In simple terms, a Pulse Induction (PI) metal detector sends out short bursts of current through a coil of wire. Rather than a continuous current, it is more of a regular, on-off type burst. With each pulse comes a brief magnetic field, and once that pulse ends, the field will reverse polarity and collapse.